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Finding the Fourth Proportional to 5,420.77, 7,480.65 and 2,936.77

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Solution

The fourth proportional to 5,420.77, 7,480.65 and 2,936.77 is: 4,052.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,420.77 : 7,480.65 = 2,936.77 : x
  2. Step 2: Convert to fraction form
    5,420.77/7,480.65 = 2,936.77/x
  3. Step 3: Cross multiply
    5,420.77x = 7,480.65 × 2,936.77
  4. Step 4: Simplify right side
    5,420.77x = 21,968,948.50
  5. Step 5: Solve for x
    x = 21,968,948.50/5,420.77
  6. Step 6: Final answer
    x = 4,052.74

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.